Tap the blue circles to see an explanation.
$$ \begin{aligned}\sqrt{9}^2& \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle1}{\textcircled {1}} } }}}3^2 \xlongequal{ } \\[1 em] & \xlongequal{ \color{blue}{ \text{\normalsize{ \htmlClass{explanationCircle explanationCircle2}{\textcircled {2}} } }}}9\end{aligned} $$ | |
① | $$ \sqrt{9} = 3 $$ |
② | $ 3 ^ 2 = 9 $ |